Huyhn’s on-line bio says she graduated from Princeton and from Emory Law School. On her Facebook page, she speaks of how she was born in post-war Vietnam in May of 1976. Her family escaped by boat and made it to the United States.

In November, 2015, she wrote, “I am proud of my refugee status. I am thankful for the opportunities this wonderful country has afforded me and my family. I would not be here if the State of Georgia had closed their doors and hearts to my family. I think this great state and the U.S. have more love to give.”

Huyhn’s sister wrote on her own Facebook page about “My beautiful, smart, hilarious sister… shot on the way to work…There is a void in the world, now, where my role model and inspiration used to be.”

Police believe the gunman, seen in surveillance video, targeted Huyhn for some unknown reason. Atlanta Police Homicide Lt. Ricardo Vazquez said Monday the gunman walked right up behind the 40-year-old, shot her in the back and took off the way he came.

“It shows that he was very calm before the shooting incident,” Vazquez said.

Investigators still have very few details to explain why anyone would have targeted Huynh, but they’re hoping someone recognizes the man in the video and calls Atlanta police or 911 -- fast.